My pup buyers don't pick them and I'm very up front about it. I chose the pups for the homes. People come up with crazy ideas about playing with puppies, tests, birds, wings etc. If you've chosen a breeder with a reputation and checked on that reputation with people outside breeders "said" group, you'll find the best pup. I made one exception. A lady who trains diabetic detection dogs for people around the world. I allowed her to chose the pup fitting of her program. She's a professional and had a specific and science based procedure for her needs. This was for her personal dog to train to save her life. She also runs hunt tests and obedience trials.
Otherwise, field trial homes, hunt test homes, hunting homes, dual/show hunting homes- have yet to sell a pet in my two litters.